Does anyone earn with their blog?

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I have my own blog which you can look at on my profile page, but I haven't really earned any money from it so far. Does anyone know a good way to earn with a blog? I joined a site called blogsvertise but I haven't recieved any tasks to write about on my blog yet... So if anyone knows a good way can you please help me out. Thanks a lot, Wuduyathink.